Coupling for a paintbrush and extension pole



FIG. 1 is a top and end perspective view of a coupling for a paintbrush and extension pole showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is an elevational view as seen from the opposite end of that shown in FIG. 1. 

The ornamental design for a coupling for a paintbrush and extension pole, as shown and described. 